MEMBERS AREA

Scientific Comitee

The Scientific Committee is composed of internationally recognized experts who play a key role in shaping the scientific direction and ensuring the academic excellence of the Academy.

Laser cutting,drilling and machining (SC-CDM)

Challenges in laser cutting, drilling and machining

(1) Composite materials cutting including minimising recast and heat affected zones, processing speed (materials removal rate) and throughput;

(2) Defect-free brittle materials cutting;

(3) Non-uniform thickness materials and thick session materials cutting;

(4) Striation-free laser cutting;

(5) Laser cold cutting and drilling of engineering materials (heat affected zone less than 1 micron) at high material removal rate;

(6) Zero-taper hope drilling, reversed taper hole drilling;

(7) Effective shaped hole drilling with a single laser;

(8) High-aspect ratio (>20:1) hole drilling;

(9) Crack-free drilling of brittle materials.

Challenges in laser welding

(1) Porosity issue in welding lightweight materials and thick section materials;

(2) Laser welding of thick session materials > 25 mm with high quality;

(3) Laser welding of dissimilar materials (especially between metal and non-metal);

(4) Laser welding of nano-materials;

(5) Laser welding of high reflection materials with high quality and high energy efficiency;

(6) Laser welding of glass and ceramics.

Challenges in laser additive manufacturing

Definition: 2D additive patterning and 3D components by laser layered additive manufacturing.

(1) Photonic Integrated Circuit (PIC) fabrication by lasers;

(2) Functional nano-structures (such as graphene, metamaterials) by laser additive manufacturing;

(3) Laser additive manufacturing with blown powders: resolution, accuracy, distortion and surface finishing;

(4) Multiple materials and multi-functional materials additive manufacturing;

(5) Laser direct writing deposition: efficiency and throughput;

(6) Deposition of electronics materials.

Challenges in laser micro/nano fabrications

1. Surface texturing: (metals, semiconductors, ceramic and plastic) Metal Wettability change with time: mechanisms (mixed effect of micro/nanostructures, Carbon/oxide and charging effects);

2. Super-resolution and far field nano-imaging: Active 3D meta-materials;

3. Laser tuning of chemical reactions;

4. Other 2D materials: Hybrid 2D materials and PLD etc.;

5. Laser cold processing;

6. Large scale micro/nanostructures fabrication;

7. Super-capacitor;

8. Cold Graphene deposition;

9. Fast charging battery;

10. Multi-wavelength interference with white light laser nano-lithography;

11. Laser nano-welding of metallic NPs;

Challenges in laser surface engineering

Laser surface engineering includes but not limited to cladding, alloying, hardening, cleaning, polishing, Shock peening, macro-texturing/abrading,

(1) Laser cladding low cost and high surface finishes (benchmarking with electroless plating);

(2) Laser cladding of ceramic without cracks;

(3) Cladding metals on plastics;

(4) Cold cladding;

(5) Laser surface engineering with low surface smoothness;

(6) Laser polishing with surface roughness Ra <10 nm;

(7) Laser assisted localised polishing of optics with surface smoothness <1 nm.

(8) Laser surface engineering inside the small diameter tubes;

Challenges in lasers, optical components and systems

(1) Ultrafast laser (ps, fs and as) for industrial scale applications;

(2) High power laser wavelength tunability;

(3) High peak power laser beam transmission through an optical fibers;

(4) Laser beam handling (e.g. high speed scanning; fs laser pulse dispersion problems);

Challenges in modelling and simulations

1. Lack of detailed data of materials’ optical and thermal property databases above 1000 degrees;

2. Multi-phase, multi-materials, multi-scales;

3. Documents on the research outcomes in modelling and simulation over the last 40 years, to reduce the duplicating the research works, Historical data reinventing wheels;

4. Modelling validation, not by the same group;

5. How many photons needed for the processing? How much it cost for a photon?

6. Additive/ablation: precisely predict materials addition and loss in modelling;

7. From laser parameters to components properties: macroscopic/microscopic impacts/efficiency of photons;

Challenges in photonic sciences

(1) Large-area periodic designed sub-wavelength structures fabrication at a high speed;

(2) Far-field super-resolution imaging and fabrication;

(3) Loss problem in metamaterials;

(4) Laser interaction with nano-material and properties;

(5) Nanophotonics devices: bandwidth >100 THz; power consumption <1 fJ/bit; light source, detector, waveguide, modulator and switch.

This Scientific Committee focuses on hybrid laser and non-laser manufacturing processes and related scientific and technological issues.

Examples of such processes may include:

  • hybrid laser/arc welding,
  • hybrid laser/water cutting,
  • hybrid laser/ECM machining,
  • hybrid or sequential laser/EDM drilling,
  • electrical current or magnetic assisted laser welding etc.

 

The understanding of energy field interactions in these processes and the identification of added values compared with laser alone or non-laser processes are the main scientific challenges.

Grand challenges in laser materials processing

1. Low-cost high-throughput high-quality cold laser machining.

2. Energy efficiency in laser processing.

3. Standardization of laser sources, systems and processing.

4. Micro/nano-processing for large area/macro-parts; high efficiency to high resolution.